Product Description
MAHLE HS54580C is the OE-quality upper head gasket set engineered for the 2011–2016 GM 6.6L Duramax LML. Built to MAHLE standards for heat-cycle stability and sealing integrity, this kit includes the critical top-end gaskets and seals you need when servicing cylinder heads—ideal for stock rebuilds, tow rigs, and high-mileage work trucks.
Fitment
- 2011–2016 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LML
- 2011–2016 GMC Sierra 2500HD / 3500HD 6.6L Duramax LML
- Head gaskets are sold separately—select correct side and thickness (Grade A/B/C) for your VIN/how-many-hole measurement.
What’s Included
- Upper-engine service gaskets & seals for a cylinder-head job (intake/exhaust manifold, injector & valve cover seals, valve stem seals, RTV where applicable)
- Does not include MLS head gaskets or head bolts.
Cross-Reference / OE Numbers
- OE interchange commonly referenced: 98403365, 98434773
- Mahle Kit Type: HS (Head Set) – HS54580C
Recommended MAHLE Pairings (Internal Links)
- MAHLE 54580 Right Head Gasket – Grade A 0.95 mm (01–16 LB7/LLY/LBZ/LMM/LML)
- MAHLE 54585 Left Head Gasket – Grade C 1.05 mm (01–16 LB7/LLY/LBZ/LMM/LML)
- MAHLE GS33937 Turbo Mounting Gasket Set – 11–16 LML/LGH
- MAHLE OS32471 Engine Oil Pan Gasket – 11–16 LML
- MAHLE GS34005 Engine Oil Cooler Gasket Set – 01–16 Duramax
- MAHLE F31903 Exhaust Manifold-to-Up-Pipe Gasket – 01–16
- MAHLE F32918 Up-Pipe-to-Turbo Gasket – 01–16
Why MAHLE
- OE-grade materials and emboss patterns for clamp-load retention
- Direct-fit geometry for faster installs and fewer comebacks
- Trusted in fleet service and stock rebuilds
Installation Notes
- Confirm head gasket thickness/grade per GM bulletin or hole-punch ID
- Inspect head/block surface finish and flatness; follow torque sequence
- Replace torque-to-yield head bolts or upgrade to studs
FAQ
Does HS54580C include the two MLS head gaskets?
No. This is the upper head set. Add the correct left/right MLS gaskets (5458x/5459x family) in the proper grade and thickness.
Will this fit all LML years?
Yes—covers 2011–2016 Silverado/Sierra HD with the 6.6L LML. Verify by VIN and service manual.
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | HS54580C |
| UPC / GTIN | 027067004062 |
| Shipping Info | Ships from CPP Diesel. Listing shows Free Shipping; typical package dims approx. 10.00" W × 1.00" H × 24.00" L. |
| Country of Origin | Not specified |
| Prop 65 | This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
